BEIRUT/MUNICH (Reuters) - The Turkish army shelled Kurdish militia in northern Syria for a second day on Sunday, while Russia made clear it would continue bombing Syrian rebel targets, raising doubts that a planned ceasefire would bring much relief.

Major powers agreed on Friday to a limited cessation of hostilities in Syria but the deal does not take effect until the end of this week and was not signed by any warring parties - the Damascus government and numerous rebel factions fighting it.